Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1978-08-17
1981-05-05
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 2700
Patent
active
RE0306037
ABSTRACT:
Circuitry including a resistance sensor is excited by an external power source. A reference voltage is established, the voltage developed across the sensor resistance is compared at an amplifier input with a reference voltage signal and the voltage across a feedback resistor, and the total current drawn through the circuitry adjusts as a function of the sensor resistance to give a balanced amplifier input. Total current may be made a linear function of sensor resistance or a nonlinear function by proper selection of certain resistors.
REFERENCES:
patent: 2930224 (1960-03-01), Bodner et al.
patent: 2974279 (1961-03-01), Barry et al.
patent: 3177427 (1965-04-01), Kuntz et al.
patent: 3286171 (1966-11-01), Fluegel et al.
patent: 3302106 (1967-01-01), Shaw
patent: 3322971 (1967-05-01), Chung-Chuan Liu
patent: 3408584 (1968-10-01), Miller, Jr. et al.
patent: 3483476 (1969-12-01), Kobayashi et al.
patent: 3517556 (1970-06-01), Barker
Oswald, Thermistor Temperature to Current Transducer, IBM Technical Disclosure Bulletin, May 1965, pp. 1124-1126.
Krawczewicz Stanley T.
Rosemount Inc.
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